The present invention relates to a method for producing a copper electrocatalyst for carbon dioxide reduction, comprising the steps of: (A) dissolving a copper precursor in an organic solvent and then subjecting it to a first heat treatment to prepare a copper precursor solution; (B) dispersing the carbon support in a mixed solution of a fixing agent and an organic solvent by ultrasonic to prepare a carbon support solution; And (C) mixing the copper precursor solution and the carbon support solution to perform a second heat treatment, thereby preparing copper and copper oxide nanoparticles of various sizes and shapes, and using the same to produce electrochemical carbon dioxide reduction performance It can be applied as an excellent Cu / C based electrode.
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